If you already have a domain name, please go to your domain registrar's website and add a DNS A-record of: mail.YourDomain.com and an MX-record. For more detailed info, please logon www.drivehq.com, and then visit this page:
http://www.drivehq.com/homepages/DnsHosting.aspx
Note DriveHQ email hosting server IP is 66.220.9.56
If you have any more questions about DNS entries, please contact your domain registrar company for support.